Up to 800 codes or ibuttons per lock Free online code generation via secure log-in Option to program individual user code for a specified time Easily installed on either left or right swing doors Weather resistent Illuminated keypad 4 AA batteries (not included) Pre-program set times for lock/unlock for up to 7 days One-time user code option for maintenance, housekeeping, etc. Auto adjust for daylight savings time Audit trail feature Mechanical backup key included